ViewportInfo Properties

This property assumes the camera is horizontal and crop the film rather than the image when the aspect of the frustum is not 36/24. (35mm film is 36mm wide and 24mm high.) Setting preserves camera location, changes the frustum, but maintains the frustum's aspect.

Gets or sets the 1/2 smallest angle. See GetCameraAngles(Double, Double, Double) for more information.

Gets the direction that the camera faces.

Gets the camera location (position) point.

Gets the camera up vector.

Gets the unit "to the right" vector.

Gets the unit "up" vector.

Gets the unit vector in -CameraDirection.

Default z=up perspective camera direction

Indicates if this object has been disposed or the document it originally belonged to has been disposed.

Setting FrustumAspect changes the larger of the frustum's width/height so that the resulting value of width/height matches the requested aspect. The camera angle is not changed. If you change the shape of the view port with a call SetScreenPort(), then you generally want to call SetFrustumAspect() with the value returned by GetScreenPortAspect().

Gets the frustum bottom value. This is -top if the frustum has a horizontal symmetry axis.

This number is usually negative.

Gets the frustum bottom plane that separates visible from off-screen.

Gets the frustum center point.

Gets the frustum far-cutting value.

Gets far clipping plane if camera and frustum are valid. The plane's frame is the same as the camera's frame. The origin is located at the intersection of the camera direction ray and the far clipping plane. The plane's normal points into the frustum towards the camera location.

Gets the frustum height. This is FrustumTop - FrustumBottom.

Gets the frustum left value. This is -right if the frustum has a vertical symmetry axis.

This number is usually negative.

Gets the frustum left plane that separates visible from off-screen.

Gets the frustum maximum diameter, or the maximum between FrustumWidth and FrustumHeight.

Gets the frustum minimum diameter, or the minimum between FrustumWidth and FrustumHeight.

Gets the frustum near-cutting value.

Gets near clipping plane if camera and frustum are valid. The plane's frame is the same as the camera's frame. The origin is located at the intersection of the camera direction ray and the near clipping plane. The plane's normal points out of the frustum towards the camera location.

Gets the frustum right value. This is -left if the frustum has a vertical symmetry axis.

This number is usually positive.

Gets the frustum right plane that separates visible from off-screen.

Gets the frustum top value. This is -bottom if the frustum has a horizontal symmetry axis.

This number is usually positive.

Gets the frustum top plane that separates visible from off-screen.

Gets the frustum width. This is FrustumRight - FrustumLeft.

Gets true if this class has any custom information attached to it through UserData.

Sets the viewport's id to the value used to uniquely identify this viewport. There is no approved way to change the viewport id once it is set in order to maintain consistency across multiple viewports and those routines that manage them.

Gets or sets a value that indicates whether the direction that the camera faces is unmodifiable.

Gets or sets a value that indicates whether the camera location is unmodifiable.

Gets or sets a value that indicates whether the camera up vector is unmodifiable.

If true this object may not be modified. Any properties or functions that attempt to modify this object when it is set to "IsReadOnly" will throw a NotSupportedException.

Gets or sets a value that indicates whether the camera frustum has a vertical symmetry axis.

Gets or sets a value that indicates whether the camera frustum has a horizontal symmetry axis.

Get or set whether this projection is parallel.

Get or set whether this projection is perspective.

Gets a value that indicates whether this projection is a two-point perspective.

Tests an object to see if it is valid.

Gets a value that indicates whether the camera is valid.

Gets a value that indicates whether the frustum is valid.

Expert user function to control the minimum value of near when perspective projections are being used.

Expert user function to control the minimum ratio of near/far when perspective projections are begin used.

Get or set the screen port. SetScreenPort(Rectangle) and

Gets the screen aspect ratio.

This is width / height.

The current value of the target point. This point does not play a role in the view projection calculations. It can be used as a fixed point when changing the camera so the visible regions of the before and after frustums both contain the region of interest. The default constructor sets this point on ON_3dPoint::UnsetPoint. You must explicitly call one SetTargetPoint() functions to set the target point.

List of custom information that is attached to this class.

Dictionary of custom information attached to this class. The dictionary is actually user data provided as an easy to use shareable set of information.

Applies scaling factors to parallel projection clipping coordinates by setting the m_clip_mod transformation. If you want to compress the view projection across the viewing plane, then set x = 0.5, y = 1.0, and z = 1.0.